<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!--添加角色按钮区域-->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!--角色列表区域-->
      <el-table :data="roleList" border stripe>
        <!--展开列-->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bd-bottom',i1===0?'bd-top':'','v-center']" v-for="(item1,i1) in scope.row.children"
                    :key="item1.id">
              <!--渲染一级权限-->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!--渲染二级和三级权限-->
              <el-col :span="19">
                <!-- 通过 for 循环 嵌套渲染二级权限 -->
                <el-row :class="[i2===0?'':'bd-top','v-center']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" closable @close="removeRightById(scope.row,item3.id)"
                            v-for="(item3,i3) in item2.children" :key="item3.id">{{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!--<pre>
              {{scope.row}}
            </pre>-->
          </template>
        </el-table-column>
        <!--索引列-->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="rolDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" size="mini" icon="ei-icon-edit">编辑</el-button>
            <el-button type="danger" size="mini" icon="ei-icon-delete">删除</el-button>
            <el-button type="warning" size="mini" icon="ei-icon-setting"
                       @click="showSetRightDialog(scope.row)">分配权限
            </el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限 的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible"
               width="50%" @close="setRightDialogClose">
      <!-- 树形控件
        show-checkbox:显示复选框
        node-key:绑定属性
        default-expand-all:默认全部展开
        default-checked-keys:默认勾选的节点的key的数组
      -->
      <el-tree :data="rightList"
               :props="treeProps"
               show-checkbox
               node-key="id"
               default-expand-all
               :default-checked-keys="defCheckedKeys"
               ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible=false">取&nbsp;消</el-button>
        <el-button type="primary" @click="allotRights">确&nbsp;定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
    /* todo 新增  编辑 删除 参考 用户管理 自行添加 */
    export default {
        name: "Roles",
        data() {
            return {
                // 所有角色列表数据
                roleList: [],
                // 控制分配权限对话框的显示与隐藏
                setRightDialogVisible: false,
                // 所有权限的数据（树）
                rightList: [],
                // 树形控件的属性绑定对象
                treeProps: {
                    label: 'authName',
                    children: 'children'
                },
                // 默认勾选的节点的id值的数组
                defCheckedKeys: [],
                // 分配权限按钮点击时，当前点击的角色id（当前即将分配权限的角色id）
                roleId: ''
            }
        },
        created() {
            this.getRoleList()
        },
        methods: {
            // 所有角色列表数据
            async getRoleList() {
                const {data: result} = await this.$http.get('roles')
                if (result.meta.status !== 200) {
                    return this.$message.error(result.meta.msg || '获取角色列表失败！')
                }
                this.roleList = result.data
                console.log('this.roleList---', this.roleList)
            },
            // 根据主键id删除对应的权限
            async removeRightById(role, rightId) {
                // 弹框提示用户是否要删除
                const confirmResult = await this.$confirm('此操作将永久删除该记录，是否继续？', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).catch(error => error)
                if (confirmResult !== 'confirm') {
                    return this.$message.info('取消了删除操作')
                }
                const {data: result} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
                if (result.meta.status !== 200) {
                    return this.$message.error(result.meta.msg || '删除权限失败！')
                }
                role.children = result.data
            },
            // 展示 分配权限 的对话框
            async showSetRightDialog(role) {
                this.roleId = role.id
                // 获取所有的权限数据
                const {data: result} = await this.$http.get('rights/tree')
                if (result.meta.status !== 200) {
                    return this.$message.error(result.meta.msg || '获取权限数据失败！')
                }
                this.rightList = result.data
                // console.log('this.rightList---', this.rightList)
                // 递归获取三级节点的id
                this.getLeafKeys(role, this.defCheckedKeys)
                this.setRightDialogVisible = true
            },
            // 通过递归的方式，获取角色下所有三级权限的 id，并保存到 defCheckedKeys 数组中
            getLeafKeys(node, arr) {
                // 如果当前的node 不包含children，就是3级节点了
                if (!node.children) {
                    return arr.push(node.id)
                }
                node.children.forEach(item => {
                    this.getLeafKeys(item, arr)
                })
            },
            // 监听 分配权限对话框的关闭事件
            setRightDialogClose() {
                this.defCheckedKeys = []
            },
            // 点击为角色分配权限
            async allotRights() {
                const keys = [
                    ...this.$refs.treeRef.getCheckedKeys(),
                    ...this.$refs.treeRef.getHalfCheckedKeys()
                ]
                // console.log('keys---', keys)
                // 数组拼接字符串
                const idStr = keys.join(',')

                const {data: result} = await this.$http.post(`roles/${this.roleId}/rights`, {rids: idStr})
                if (result.meta.status !== 200) {
                    return this.$message.error(result.meta.msg || '分配权限失败！')
                }
                this.$message.success(result.meta.msg || '分配权限成功！')
                this.getRoleList()
                this.setRightDialogVisible = false
            }
        }
    }
</script>

<style lang="less" scoped>
  .el-tag {
    margin: 7px;
  }

  .bd-top {
    border-top: 1px solid #eee;
  }

  .bd-bottom {
    border-bottom: 1px solid #eee;
  }

  /* 纵向居中对齐*/
  .v-center {
    display: flex;
    align-items: center;
  }
</style>
